Deploying software that’s no longer maintained afresh

There’s a tool that I’ve used at other companies that I absolutely love. It has features that few other products have and I’m a lot more productive with it than with those other products.

Wile there are efforts by open-source contributors, it’s no longer maintained by its original developers and hasn’t been for approximately two years.

I’m thinking of using it at my startup, but I worry that it’ll end up with me focusing more on managing the risk that comes with legacy software more than on my core product.

Does anybody please have advice either way?